trunk port connecting but network tree not available on pc

June 26, 2012 at 10:01:37
Specs: Windows XP
trunk port connecting but not allowing access to tree; i connected 4506 port to 3550 port; and i set both to switchport mode dynamic desirable; the 4506 port was set with switchport mode access and switchport mode access vlan ?; i used the command default switchport access vlan to remove the vlan; the ports are up but as I stated I cannot connect ot our workgroup tree

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#1
June 26, 2012 at 10:12:33
Is the vlan defined on both switches? It might be helpful to post the config files of the switches as well.

--
Andrew Leonard
BL Technical Services
IT Support Maryland


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#2
June 26, 2012 at 12:09:36
Did you set the ports as trunks? From what I can see you didn't.

Typically you would perform the following commands:

enable (enter privileged mode)
configure terminal
int [port]
switchport trunk encapsulation dot1q
......

Once set as a trunk, confirm the setting:

show int [port]


You also shouldn't have to set any VLAN's on the trunk ports. By default a trunk port carries all VLAN's

You should post your config's. If you're using routable IP's, be sure to XXX the last two octets out.

It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.

***William Henley***


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#3
June 27, 2012 at 06:26:23
It still did not work. It will not allow me to run switchport trunk encapsulation dot1q on the 4506 router.

Below is the config for both ports

3550
interface GigabitEthernet0/1
description Gi0/1
switchport trunk encapsulation dot1q
switchport mode dynamic desirable

4506
interface GigabitEthernet2/14
description GigabitEthernet2/14
switchport mode dynamic desirable

Thank you for any help you can provide..


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#4
June 27, 2012 at 07:29:49
It may differ on a router from a switch. I know the command does indeed work on the Cisco switches I've worked with that required trunk ports. In our environment, that's every single uplink port since we have multiple VLAN's running. However, we've phased almost all our Cisco switches out (only 2 left in production) in favor of easier to work with switches and UNIX (OpenBSD) based router/firewalls.

Hit google and Cisco's knowledgebase and research how to create a trunk port on a 4506 router.

It may also be necessary for you to join a Cisco forum to get the help you need.

Sorry, I'd like to do more but the only Cisco routers I have experience on are older (2600, 2800) and that was around 6 or 7 years ago.

It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.

***William Henley***


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